Can HIV spread from touching spilled blood on a surface?

Hello doctor,

I usually check my blood sugar at home, and I have a maid who cleans our home, including bathrooms. I am worried that it is her blood that gets spilled and that she is infected. Can I ask my maid if she is HIV positive? I have noticed brown blood during my periods for the last month, and worried that I am infected by touching the blood present on a surface and then using the same finger to prick and test my blood sugar. What are the chances of HIV exposure in this way?

Kindly help.

Thank you.

Hello doctor,

Thank you for the reply.

Can you tell me if there is any possibility for the virus from surfaces to spread infection? Kindly help.

Thank you.

Hello doctor,

Thank you for the reply.

I am worried that it has something to do with HIV. I have also noticed whitish patches in my mouth, and my husband is getting sores in his mouth, which stay for a week. What could cause this? Kindly help.

Thank you.

Hello doctor,

Thank you for the reply.

I got tested for HIV a year ago, and I want to know if these situations put me at risk. Kindly help.

Thank you.

Hello doctor,

Thank you for the reply.

I am also worried that last week I used a public restroom at a marriage function and could not wash my hands as it looked too dirty. I used my hand to shut the door and lock it. I thought I would not eat anything, but I had one bite of food with the same hand. Is it possible that I will be infected with polio?

Kindly help.

Thank you.